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Electricity & Magnetism Review

Total questions: 73

Worksheet time: 2hrs 44mins

Name
Class
Date
1.

Atoms that have a positive charge will be ATTRACTED to atoms with a ___________ charge.

a)

positive

b)

negative

c)

neutral

2.

Which of these forces works only by combining electric and magnetic forces?

a)

Magnetic

b)

Electric

c)

Electromagnetism

3.

This force occurs when ions/atoms create attractive and repulsive forces.

a)

Magnetic

b)

Electric

c)

Electromagnetism

4.

This force occurs when there is an attractive and repulsive force between two poles.

a)

Magnetic

b)

Electric

c)

Electromagnetism

5.

In a magnet the opposite poles will ___________.

a)

attract

b)

repel

6.

The magnetic field of a magnet is ____________ further away from the magnet.

a)

stronger

b)

weaker

7.

Electric charges that DO NOT move through a current are known as

a)

Magnetic

b)

Electric

c)

Electromagnetism

d)

Static Electricity

8.

What makes an electromagnet stronger?

a)

greater number of loops

b)

smaller number of loops

c)

decreasing the current

d)

decreasing the voltage

9.

An example of an electromagnet

a)

water bottle

b)

paper

c)

motor

d)

glass

10.

two type of charges in electric and magnetic forces are

a)

north and south

b)

east and west

c)

positive and negative

d)

beyonce

11.

when electrons all spin in the same direction, they create an invisible force known as

a)

electricity

b)

magnetism

c)

motor

d)

electrons

12.

When your hair stands on end, each strand repelling the other, you are experiencing

a)

magnetism

b)

ghosts

c)

static electricity

13.

when the number of electrons matches the number of protons, the atom's charge is...

a)

positive

b)

negative

c)

neutral

14.

The Law of Electric Forces states that opposite charges __________ and like charges ______________.

a)

repel , attract

b)

attract , repel

c)

attract , attract

d)

I do not know and do not want to guess.

15.

Materials that easily give up or accept electrons are known as

a)

Electron Acceptors

b)

Conductors

c)

Insulators

d)

I do not know and do not wish to guess.

16.

Materials that resist the charges flowing through are

a)

Electron Resistors

b)

Conductors

c)

Insulators

d)

I do not know and do not wish to guess.

17.

This picture is an example of a

a)

series circuit

b)

parallel circuit

c)

Alternating current

d)

I do know and do not wish to guess.

18.

The above picture is an example of a

a)

series circuit

b)

parallel circuit

c)

direct current

d)

I do not know and do not wish to guess.

19.

Magnetism is caused by

a)

magic

b)

the movement of electrons within the atom

c)

the vibration of particles

d)

the movement of protons within the atom

e)

I do not know and do not wish to guess.

20.

Regions where magnets are the strongest are known as the

a)

Strong ends

b)

Magnetic Poles

c)

Central Point

d)

Magnetizers

e)

I do not know and do not wish to guess.

21.

A magnet can exert force over a distance because the magnet is surrounded by

a)

air

b)

electrons

c)

magnetic poles

d)

magnetic fields

e)

I do not know and do not wish to guess.

22.

If you were to break a magnet in half,

a)

you would be left with two pieces that are no longer magnetic.

b)

you would have one working magnet with a N and S pole,.

c)

you would have two working magnets, both with a N and S pole

d)

I do not know and do not wish to answer.

23.

How will the two magnets above interact with each other?

a)

Repel or move away from each other

b)

Attract or come together

c)

The magnets will not be magnetic.

d)

I do not know and do not wish to answer.

24.

The above picture is an example of a/an

a)

good time

b)

electromagent

c)

battery solenoid

d)

I do not know and do not wish to guess.

25.

A device that changes kinetic energy to electrical energy is known as a/an

a)

electromagnet

b)

electric generator

c)

electric motor

d)

I do not know and do not wish to guess.

26.

Opposite charged particles, a positve and a negative particle, will

a)

attract

b)

repel or push away

c)

do nothing.

d)

i do not know.

27.

Magnetic fields are caused by —

a)

dizzy atoms

b)

spinning electrons

c)

protons

d)

neutrons

28.

What causes electric current?

a)

static electric charge

b)

moving electric charge

c)

electric shock

d)

metal objects

29.

What is the name of the circuit in which current can only take one path?

a)

series circuit

b)

parallel circuit

30.

What is the name of the circuit in which current can take multiple paths?

a)

series circuit

b)

parallel circuit

31.

Current only flows when there is a complete and unbroken path, or a(n)

a)

open circuit

b)

closed circuit

c)

magnetic circuit

d)

broken circuit

32.

In a parallel circuit, what happens to the brightness of the bulbs when more bulbs are added?

a)

brightness remains the same

b)

the bulbs appear brighter

c)

the brightness decreases

d)

the bulb burns out

33.

In a series circuit, what happens to the brightness of the bulbs when more bulbs are added?

a)

brightness remains the same

b)

the bulbs appear brighter

c)

the brightness decreases

d)

the bulb burns out

34.

Which of the following is the formula for voltage?

a)

V = I × R

b)

V = I + R

c)

V = D × T

d)

V = I / R

35.
The amount of energy behind a moving charge.
a)
Voltage
b)
Current
c)
Flow
d)
Static Discharge
e)
No choice is correct
36.
Materials that behave as a conductor and insulator. (Silicon, Germanium)
a)
Semiconductors
b)
Insulators (Poor Conductors)
c)
Conductors
d)
Voltage
e)
No choice is correct
37.

If the balloon has a negative charge, the hair must have what charge?

a)

negative

b)

positive

c)

neutral

38.
This circuit is .....?
a)
open
b)
parallel
c)
closed
d)
shows the flow of electricity
39.

What type of circuit is shown in the picture?

a)

Series Circuit

b)

Broken Circuit

c)

Parallel Circuit

d)

Open Circuit

40.

resistance is

a)

a force that attracts metal

b)

a force that allows electricity to pass easily

c)

a force that opposes the flow of electricity

41.
Generators are devices that convert _____ energy into _____ energy.
a)
chemical; mechanical
b)
mechanical; electrical
c)
electrical; mechanical
d)
potential; kinetic
42.
All of the following are conductors except _______.
a)
metal spoon
b)
wire
c)
iron nail
d)
plastic spoon
43.
Voltage is measured in __.
a)
volts.
b)
watts.
c)
coulombs. 
44.
As the resistance of a circuit increases, the current will
a)
increase
b)
decrease
c)
stay the same
45.
Current has units: 
a)
kilowatt·hour 
b)
ampere 
c)
coulomb 
d)
volt 
46.

Which statement is true?

a)

The light bulb will light up because the circuit is complete.

b)

The light bulb will light up because the circuit is broken.

c)

The light bulb will not light up because the circuit is complete.

d)

The light bulb will not light up because the circuit is open.

47.
How many Volts would it take to push 1 Amp through a resistance of 1 Ohm
a)
10 volts
b)
1 volt
c)
48 volts
d)
5 volts
48.
If the current through a circuit is 2 A and the resistance of a light bulb in the circuit is 10 Ohms, what is the voltage difference across the light bulb?
a)
5 V
b)
12 V
c)
0.2 V
d)
20 V
49.

The resistance of a light bulb is 30 ohms. If the current must double but the battery is remaining the same, the light bulb must be replaced by one with ____ ohms.

a)

60 ohms

b)

30 ohms (the light bulb resistance will not change)

c)

15 ohms

d)

More information is needed

50.

Which two changes to a metal wire both increase resistance?

a)

decreasing its length and increasing its temperature

b)

increasing its length and decreasing its temperature

c)

decreasing its thickness and increasing its temperature

d)

increasing its thickness and decreasing its temperature

51.

If there is a current of 2A and a resistance of 24 ohms, what voltage will there be?

a)

26 V

b)

48 V

c)

12 V

d)

22 V

52.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
53.

If a toaster produces 12 ohms of resistance in a 120-volt circuit, what is the amount of current in the circuit?

a)

5A

b)

10A

c)

15A

d)

20A

54.

Copper is a metal commonly used for electrical wiring in houses. Which metal conducts electricity better than copper at 20oC?

a)

nichrome

b)

gold

c)

silver

d)

aluminum

55.

The resistance of a circuit remains constant. Which graph best represents the relationship between the current in the circuit and the potential difference provided by the battery?

a)
b)
c)
d)
56.

The voltage of a circuit that has a resistance of 10 ohms and a current of 1.5 A is

a)

15 V

b)

0.15 V

c)

6.7 V

d)

None of these

57.
If the current through a circuit is 2 A and the resistance of a light bulb in the circuit is 10 Ohms, what is the voltage difference across the light bulb?
a)
5 V
b)
12 V
c)
0.2 V
d)
20 V
58.
Resistance is a measure of....
a)
the energy per unit charge in a circuit
b)
how hard it is for electrons to move through the circuit
c)
how hard it is for electrons to move through the battery
d)
the number of charge carriers in a circuit
59.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
60.
what is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
61.

Electrons flows from

a)

detect electric current

b)

negative terminal to positive terminal

c)

positive terminal to negative terminal

d)

the flow rate of electric charges through a conductor

62.

Galvanometer is used to

a)

detect electric current

b)

negative terminal to positive terminal

c)

positive terminal to negative terminal

d)

the flow rate of electric charges through a conductor

63.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
64.
What is voltage measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
65.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
66.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
67.
How do you calculate voltage?
a)
Current X Resistance
b)
Resistance ÷ Current
c)
Current ÷ Resistance
d)
Measure it with a ruler
68.
How do you calculate current
a)
Resistance X Voltage
b)
Voltage X Resistance
c)
Resistance ÷ Voltage
d)
Voltage ÷ Resistance
69.
How do you calculate resistance?
a)
Voltage X Current
b)
Current ÷ Voltage
c)
Voltage ÷ Current
d)
Current X Amps
70.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
71.
What voltage is needed to cause a 5A current flow through a 2Ω resistor?
a)
10V
b)
2.5V
c)
7V
d)
0.4V
72.
What resistance is needed to cause a 50A current flow because of a 500V battery?
a)
10Ώ
b)
5Ώ
c)
2500Ώ
d)
550Ώ
73.
What resistance is needed to cause a 20A current flow because of a 100V battery?
a)
0.2Ώ
b)
2000Ώ
c)
120Ώ
d)
5Ώ

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